<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <!--    div占一行 大盒子-->
    <div>这是div标签</div>
    <div>这是div标签</div>

    <!--    span不占一行 小盒子-->
    <span>这是span</span>
    <span>这是span</span>
</body>
</html>